No more silent but deadly. No more dutch ovens. No one will wonder who dealt it. A British company is producing underwear that can filter out the smell of farts. Shreddies, Ltd., a company in Loughborough, U.K., has used the same science that goes into chemical warfare suits to offer men's and women's underwear that can handle up to 200 times the noxious odour of the average flatulence. The science part comes from a layer of activated carbon cloth, called Zorflex, in the back panel of the underwear. This specially-designed cloth has a microporous structure, giving it a very large surface area. Apparently, just one gram of this cloth has a total surface area equivalent to half the size of a football field.